1 /* 2 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.lir.amd64; 24 25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 26 import jdk.vm.ci.amd64.AMD64; 27 import jdk.vm.ci.amd64.AMD64Kind; 28 import jdk.vm.ci.meta.AllocatableValue; 29 30 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 31 import org.graalvm.compiler.core.common.LIRKind; 32 import org.graalvm.compiler.lir.LIRInstructionClass; 33 import org.graalvm.compiler.lir.Opcode; 34 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 35 36 /** 37 * AMD64 rdtsc operation. The result is in EDX:EAX. 38 */ 39 @Opcode("RDTSC") 40 public class AMD64ReadTimestampCounter extends AMD64LIRInstruction { 41 public static final LIRInstructionClass<AMD64ReadTimestampCounter> TYPE = LIRInstructionClass.create(AMD64ReadTimestampCounter.class); 42 43 @Def({REG}) protected AllocatableValue highResult; 44 @Def({REG}) protected AllocatableValue lowResult; 45 46 public AMD64ReadTimestampCounter() { 47 super(TYPE); 48 49 this.highResult = AMD64.rdx.asValue(LIRKind.value(AMD64Kind.DWORD)); 50 this.lowResult = AMD64.rax.asValue(LIRKind.value(AMD64Kind.DWORD)); 51 } 52 53 public AllocatableValue getHighResult() { 54 return highResult; 55 } 56 57 public AllocatableValue getLowResult() { 58 return lowResult; 59 } 60 61 @Override 62 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 63 masm.rdtsc(); 64 } 65 }